Skiving-machine.



A.v M. AtEXANDER.

SKIVING MACHINE.

APPLICATtON FILED DEC. 3t 1914. 1,200,066. Patented 0%. 3,1916.

3 SHEETSSHEET I.

WITNESSES N ENTOFQ WwVz/izr W' A. M. ALEXANDER.

SKIVING MACHINE.

APPLICATION FILED DEC. 31, 1914- I 1,200,066. Patented Oct. 3,1916.

3 SHEETS-SHEET 2- |NVENTUR A. M. ALEXANDER.

SKIVING MACHINE.

APPLICATION FILED 02c. 31, 1914.

1,200,006. I Patented O0t.3,1916.=.

3 SHEETS-SHEET 3.

WITNES 5E5 NVENTOR ED STATES PATENT orrron.

ALEXANDER M. ALEXANDER, OF BEVERLY, MA SSACHUSETTS ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEM JERSEY, A- CORPORATION OF NEW JERSEY.

Specificationof Letters latent.

SKIVING-MACHINE.

Patented Oct. '3, 1916.

v 7 Application filed December 31, 1914. Serial No. 879,904

To all whom it may concern:

- Be it known that I, ALEXANDER ANDER, a citizen of .the United States, residin at Beverly, in the county of Essex and gtate of Massachusetts, have invented certain new and useful Improvements in Skivin -Machines; and I do hereby declare, the fol owing to be a'full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the'same.

he present invention relates to skivlng machines and more particularly to skiving machines having a rotary cylindrical skiving knife for operating upon leather or analogous materials.

One object of the present invention is to so improve the construction and operation of machines of this character that pieces of leather may be split throughout their width or beveled upon ,the edge with equal facility.

A further object-of the invention is to provide a machine in which the knife and.

ing the preferred form of the invention;

Figure 1 representsa front elevation partly in, section of a machine embodying the several features of the invention; Fig. 2 1s a top plan view of the machine shown in Fig. 1; Fig. 3 is an end elevation of the machine shown in Fig. 1;-Fig. 4 is a detail showing 'the mechanism for clamping the knife blade 'to the holder; and Fig.5 is a detail illustrating partially diagrammatic the cutting edge of the knife and the cooperating work feeding mechanism to show the manner'in which the work is fed by the v cutting edge.

M. ALExin bearing 3 supported by It will be obvious 'to those skilled in the art that when using this machine for splitting leather the work must be gripped firmly over a'considerable portion of its area to'prevent the action of the knife edge from diverting it from its path of feed. In employingthe machine for beveling the edge, however, it is advisable to grip only a small portion of the work immediately in advance of the cutting edge to permit the work to be turned as desired when feeding it to the knifeaadge. In the present invention feeding mechanism is employed which is arranged to 'grip the work fora greater or less distance in advance of the knife edge, in

7 order to accommodate the. machine for operation for either skiving or splitting. The machine shown in the illustrated embodiment of the invention comprises a casing 1 having a rotary skiving knife, indicated generally at 2 and journaled in a stationary the casing. The work is fed to the. knife by cooperating feeding members indicated respectively at 4 and 5 and engaging with opposite faces of the leather. These feeding members are provided with feeding surfaces which may move either in parallel paths or in paths inclined to one another in order to vary thearea of the work engaged bythe feeding surfaces. To this end the feeding members comprise two cooperating feed belts 6 and 7 which may be adjusted to have a substantial area of contact between the feeding surfaces and the work,-as shown clearly in F g. 1, or may be adjusted so that one feed surface engages the work with substantially a line contact immediately in front of the cutting edge. The feed belt 6 engages with the upper surface of the work and passes over rolls 9 and 10 at its opposite ends which are. supported by. an overhanging head 15. The roll 10 is journaled upon the lower end of ahead 13 and is operatively connected to the roll through an arm 12 fulcrumed concentrically with the roll.

The position of the two rolls and feed belt 7 is determined by a curved arm 14 connecting the end of thearm-12 with a projecting arm formed upon the head 13 and provided with aslot 16 which receives a clamping stud 18 this construction, by looseifing the clamp ing stud thearm 12 may be adjusted about iii? the. axis of the roll 9 to position the, feed belt 6 either parallel or at an inclination: to the eoiiperating feed belt 7, thus varying the area of the work which is engaged by the feeding members. The. belt 6 is normally retained in the position shown in Fig. 1 in which the entire Working portion of the belt engages with the work by a tension spring 20 which connects the head 15 With' an arm 21 projecting rearwardly from the arm 12. The rolls 9 and 10 and the belt 6 are curved transversely to conform substantially to the curvature of the knife, as shown clearly in Figs. 1 and 3, and the head 13 is, providedwith a transverse adjustment relative to the supporting head 15 in order to position the presser belt relative to the kmfe as is usual in machines of this type. A vertical adjustment of the supporting rolls and belt is obtained in the usual manner through;

the provision of an adjusting screw 22 threadedly supported in the head 15. The work is retained in engagement with the presser belt by a feed belt 7 engaging with the under side of the work and supported at its opposite ends upon roils 23 and 24 which are journaledupon a supporting arm 26 fulcrumed at 27. The feed belt is yieldingly retained in the position slrowrfin Fig. 1 by a spring 30 interposed between the machine frame and a depending leg 29 which is recessed to receive the end of the spring. The normal position of the feed belt is determined by an adjustable stop member 31 which engages with a cotiperating projection 32 formed upon the depending leg 29 to limit the upward movement of the feed belt in the usual manner. The upper or presser belt, as itmay be termed, serves as a presser member to gage the movements of the work relativeto the knife,jwhereas the lower or 7 feed belt maintains the work in engagement with the presser belt and feeds it against thecutting edge. To this end machanism is provided for driving the roll 23 from a shaft 34. It will be noted from an inspection of the drawings that the roll 23 is larger than the roll 24 and has sufficient peripheral area to properly engage with-and drive the belt.

The. roll is connected to the 'countershaft 34 through intermeshing worm gearing indicated at 35 and' a short traverse shaft 36 connecting the worm gears and roll to a pair of'universal joints indicated respectively at 3? and 38. The shaft 34 is connected to the main drive shaft 40 through a connecting belt 41 and drive pulleys 42 and 43, respectively.

in machines of form the cutting edge by beveling theouter surface of the knife and with this construction considerable difiicnlty may experithis type it is customary to naoacee face of the presser belt or other member which engages with the work above the knife. To. this end .the present invention contemplates supporting the knife at an inclination to the direction of feed of the work in such a manner that the beveled outer surface of the knife extends in a direction substantially parallel to the direction of feed at a point where the knife engages with the work. in the illustrated embodiment of the invention the knife is journaled obliquely in a stationary bearing 3 and projects upwardly'into a position in which the operating portion of the cutting edge is located between and in close proximity to the feeding members, .the arrangement enabling suiticient clearance to be obtained for the passage of the work between the knife and presser belt, as shown clearly in Fig. 5.

The rotary skiving knife employed in the present invention comprises a knife blade which is clamped rigidly to an internal holder to enable a true cutting edge to be obtained and which may be readilyadjusted to permanently maintain the cutting edge in operative relation to the feeding members as the cutting edge is ground away.

this end a knife blade 45 is supported upon an internal holder 46 and is clamped to the holder by a split clamping ring 47, the opposite ends of which are drawn together to contract the ring by pivoted actuating levers 49 engaged by a tapered head 50. As

52 serves to inclose the knife blade and actuating mechanism and is threadediy secured to a supporting ring 54 mounted upon the knife holder 46. The knife blade connected to an adjusting ring 55 threadedly 'mounted upon the knifeholder, as shown in Fig. 1, and by relatively rotating the knife holder and adjusting ring the blade may he moved axially. In order to convenulentl perform this adjustment the adjusting ring is connected to the casing 52' by a pin 56 which is received in an elongated slot formed in the casing, and thus by holding the casing and rotating the knife holder an adjustment of the blade is secured.- The knife holder is rotated through agrooved drive pulley 5? which is mounted upen the holder and secured thereto .by a clamping screw 58. The holder mounted. hollow tapered support 59 in in the hearn i r a simple and compact mechanism has beenprovided for adjusting the knife blade and for clamping it in any adjusted position and furthermore, the interior of the rotary knife isfree and clear for the passage'of chipsor other Waste material. The bearing 3 is provided with flanged projections'63 and 64 upon opposite sides secured to the casing of. the machine and forming a subby a main drive pulley 66.

stantial continuation of the hollow passage in the interior of the knife.- The drive pulley 57 is actuated from a pulley 65 mounted upon'the main drive shaft 40 of the machine and driven from any suitable source It should be understood that it is within the scope of the present invention to actuate either the upper or lower belt to feed the work and that the designation of the cooperating belts as feed members is for convenience of description, only.

While it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention. p

The invention having been described, what is claimed is:

1. A skiving machine, having in. combination, a cylindrical skiving knife, feeding members havingfeedi'ng surfaces engaging with opposite sides of the workto guide and feed the work tothe knife and mechanism for adjusting the feeding surfaces to determine the area of contact between the feeding surfaces and thework- 2. A skiving machine, having in combination, a cylindrical skiving knife, a pair of cooperating feed belts engaging with opposite sides of the work to control the movements of the work relative to the knife, and mechanism for securinga relative adjustment of the feed belts to determine the area of contact between the feeding surfaces and the work.

3. A skiving machine, having in combination, a cylindrical skiving knife, a pair of feed belts engaging with opposite faces of the work to control the movements of the work relative to the knife, and mechanism for adjusting the belts angularly with relation to one another. 4

4. A skiving machine, having in combination, a cylindrical skiving knife, a feed belt engaging with the under side of the work, a cooperating presser belt engaging with the upper side of the work, and mechanism for adjusting the presser belt angularly relative to the feed belt.

5. A skiving machine, having in combination, a cylindrical skiving knife, a feed belt,

'a presser belt, means for supporting the presser'belt at opposite ends, and means for adjusting the presser belt angularly with relation to the feed belt. I

6. A skiving machine, having in combi- .nation, a cylindrical skiving knife, a pair of'cooperating' feed belts, mechanism for normally retaining the belts in position in "which the working portions move in parallel paths, and means for securing a relative adjustment of the belts to cause the working portions to travel in paths inclined to one another. V 7. A- skiving machine, having in combination, a pair of cooperating feed members engaging with the work upon opposite sides of the cutting edge to determine the direction of feed of the work, a cylindrical skiving knife, and means for supporting, the skiving knife at an inclination to the direction of feed of the work.

I 8. A skiving machine, having in combination, a cylindrical skiving knife having a beveled outer surface, a pair of members including a belt engaging with opposite sides of the work to control the'movements of the work relative to theknife, means for rotating the knife, and means for supporting the knife at an a'ngle to the direction of feed of the work. I

9. A skiving machine, havingv in combi- I nation, a cylindricalskiving knife having a passage extending entirely therethrough, a

' pair of cooperating members engaging with opposite sides of the workto control movements of the work relative to the knife, means forsupporting the knife'at an inclination to the direction of feed of the work,

and means for rotating the knife.

- I 10. A skiving machine, having in combination, a knife holder, a knife blade supported externally of the holder, a clamping ring engaging with the outside of the knife 115 blade, means for contracting the ring to clamp the knife blade to the holder, and a pair of cooperating feed members including a belt for controlling the movements of the work relative to the knife. I.

11. A skiving machine comprising a "cylindrical skiving knife, a head, a roll journaled in the head, an arm connected to the head and having a second roll journaled upon its free, end, a belt"supported at its opposite ends upon the two rolls, and a curved arm adjust-ably connecting the free end of the roll supporting arm with the head. p

12. A skiving machine, having in combi 4E r I 1,200,0ee

nation, a tubular skiving knife and a. pair substantially in conformity with the curva of coiiperating belts having feeding surture of the knife edge.

faces engaging with opposite sides of the ALEXANDER M. ALEXANDER. Work to guide the work relative to the Witnesses: knife, and means for supporting the belts .GHESTER E. ROGERS,-

with their coiiperating feed sunfaces curved E. MARION BLACK. 

